设有室外消火栓的室外给水管道，管径不得小于( )mm。
A．100 B．150 C．200 D．250
参考答案：A
During the expedition in the mountains we passed through a place where in a little while we all lost out ______ of direction.
A．sense
B．feeling
C．idea
D．ability
炽灼残渣检查时，一般炽灼温度是
A．Ag(DDC)吡啶试液B．砷斑C．白田道夫法D．微孔滤膜法E．过硫酸铵
ng the expedition in the mountains we passed through a place where in a little while we all lost out ______ of direction.